undreamt-of

He leapt to his feet, his face convulsed as if at the horror of learning of a hitherto undreamt-of state of things.

He moved on in silence, as if his energies were benumbed by the hitherto undreamt-of possibility that his position was untenable.

To Rachel, too, when once she had made up her mind to leave her father, these days were filled with an undreamt-of happiness.

Theron turned away irresolutely, half frightened at the undreamt-of impression this music was making upon him.

The young operators were carried away by the undreamt-of current of enthusiasm and awe in which they soon became involved.